Hi, I'm Tanapol from Logix Automation Thailand , We use winlog pro 512, our customer want to expand process to scada and now we have Twido , Siemens S7-200 , and OMRON CP1E . With Twido and OMRON can connect to scada correctly . and we have problem about S7-200 config as modbus rtu slave station 3 . we already connect s7-200 to ETH001 ( Ethernet to serial converter gateway can config as TCP Server/Client UDP Server/Client and modbus Server/Client ) we config ETH001 as TCP server and we config winlog protocal modbus rtu tcp . It can not connect , please give me suggestion about modbus rtu tcp of winlog protocal . and we wait for you feedback.